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6.1.2.3 App data usage
In this item, it shows the data usage of applications recently.
6.1.2.4 Data warning & limit
In this function, you are able to enable data warning when the data usage is approaching to the data limit
you set.
6.1.2.5 VoLTE calls
If you enable this option, you are able to make VoLTE calls. VoLTE service needs to be applied from
your operator before you turn on this menu, otherwise normal call functions may be affected.
6.1.2.6 Preferred network type
In this menu, you are able to select your preferred network type among LTE, 3G, 1x, and Global. Options
may vary depends on your operator.
6.1.2.7 Carrier video calling
If you enable this option, you are able to make video call through your carrier. Some carrier may not
support this function.
6.1.2.8 System select
You are able to change the CDMA roaming mode in this menu.
6.1.2.9 Access Point Names
You are able to select or manually add Access Point Names in this menu. Usually you do not have to
change settings in this page.